The test case document lists three conditions sufficient for running the
datatype-support test cases we currently have.
[SEMANTICS] includes a closure rule (rdfD 4) which is not currently
exercised by the test cases.
An example test case for this rule would be that
the empty graph
[[
]]
RDFS+D(xsd:integer, xsd:decimal)-entails
[[
xsd:integer rdfs:subClassOf xsd:decimal .
]]
Suggest adding this as a datatype test case. If RDFCore adopts this
suggestion, a consequence is that the following _fourth_ condition needs
to be added to the test case document, in the section that describes
datatype support required for test cases:
* For two "supported" datatypes T and U, it must be possible to
determine if the value space of T is a subset of the value space
of U.
[Note that "datatype support" for, say, xsd:integer and xsd:decimal, can
simply be extended to cover this by inclusing the subClassOf triple as a
known fact. However, without such support for this addition condition,
an inference engine wouldn't be able to make the entailment.]
The test cases are not required to be complete; however, it seems
appropriate to add such a (trivial) test case, but not vital.
jan
--
jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/
Tel +44(0)117 9287088 Fax +44 (0)117 9287112 http://ioctl.org/jan/
Not as randy or clumsom as a blaster.